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POSending message from one C# console application to another
 

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  1. POSending message from one C# console application to another
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    <p>First of all, I've read all related topics and they gave general idea but implementation doesn't work for me:<br/> <a href="https://stackoverflow.com/questions/12843632/send-strings-from-one-console-application-to-another">Send strings from one console application to another</a> <br/> <a href="https://stackoverflow.com/questions/451228/how-to-send-input-to-the-console-as-if-the-user-is-typing">How to send input to the console as if the user is typing?</a> <br/> <a href="https://stackoverflow.com/questions/1765493/sending-input-getting-output-from-a-console-application-c-winforms">Sending input/getting output from a console application (C#/WinForms)</a> <br/> I have a console application that is doing some actions in background until cancellation is requested. Typical usage scenario is :<br/> 1) Execute application <br/> 2) Enter input data<br/> 3) Issue start command<br/> 4) After some time passes, enter stop command<br/> 5) Exit application<br/> Child application <code>Program.cs</code> :<br/></p> <pre><code>static void Main() { Console.WriteLine("Enter input parameter : "); var inputParameter = Console.ReadLine(); Console.WriteLine("Entered : " + inputParameter); var tokenSource = new CancellationTokenSource(); var token = tokenSource.Token; Task.Factory.StartNew(() =&gt; { while (true) { if (token.IsCancellationRequested) { Console.WriteLine("Stopping actions"); return; } // Simulating some actions Console.Write("*"); } }, token); if (Console.ReadKey().KeyChar == 'c') { tokenSource.Cancel(); Console.WriteLine("Stop command"); } Console.WriteLine("Finished"); Console.ReadLine(); } </code></pre> <p>What I'm looking for is some sort of host utility to control this application - spawn multiple instances and perform required user actions on each instance. Host application <code>Program.cs</code> :<br/></p> <pre><code>static void Main() { const string exe = "Child.exe"; var exePath = System.IO.Path.GetFullPath(exe); var startInfo = new ProcessStartInfo(exePath) { RedirectStandardOutput = true, RedirectStandardInput = true, WindowStyle = ProcessWindowStyle.Hidden, WindowStyle = ProcessWindowStyle.Maximized, CreateNoWindow = true, UseShellExecute = false }; var childProcess = new Process { StartInfo = startInfo }; childProcess.OutputDataReceived += readProcess_OutputDataReceived; childProcess.Start(); childProcess.BeginOutputReadLine(); Console.WriteLine("Waiting 5s for child process to start..."); Thread.Sleep(5000); Console.WriteLine("Enter input"); var msg = Console.ReadLine(); // Sending input parameter childProcess.StandardInput.WriteLine(msg); // Sending start command aka any key childProcess.StandardInput.Write("s"); // Wait 5s while child application is working Thread.Sleep(5000); // Issue stop command childProcess.StandardInput.Write("c"); // Wait for child application to stop Thread.Sleep(20000); childProcess.WaitForExit(); Console.WriteLine("Batch finished"); Console.ReadLine(); } </code></pre> <p>When I run this tool, after first input it crashes with "has stopped working" error and prompt to send memory dump to Microsoft. Output window in VS shows no exceptions.<br/> Guess this problem occurs somewhere between applications and may be because of output stream buffer overflow (child app is writing a lot of stars each second which mimics real output which may be huge) and I yet have no idea how to fix it. I don't really need to pass child's output to host (only send start-stop commands to child), but commenting RedirectStandardOutput and OutputDataReceived doesn't fix this problem. Any ideas how to make this work?</p>
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    1. COWhy not using IPC and Pipe? It is very easy if you want to work on a single client or inside a LAN. WCF is another option.
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    2. COI need to literally pass 3 strings from one application to another. Trying to keep things as simple as possible.
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    3. COThere is in general not much point to starting many processes to get a job done. You'll accomplish the exact same thing by starting many threads. Many advantages, including getting much better diagnostics when something goes wrong.
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